Why things FAIL - Why don't Manufacturers make them last longer?

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  • Опубликовано: 30 сен 2024
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Комментарии • 43

  • @ThriftyToolShed
    @ThriftyToolShed 4 месяца назад +8

    This was a very fun collaboration with Electromagnetic Videos. It was great working with Dr. Jones and It was neat to be able to have conversations and work together even though I live in the Southern US and Dr. Jones lives in Canada. We may not ever get the chance to work together in person, but it is amazing all the things we can do remotely these days. Thanks to Dr. Jones for all the time he has put in to this. I sure learned a lot about MTBF and how manufactures design things the way we find them on the shelf.

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +3

      Thanks you so much Phillip! It was great working together on this and hope we get to do another collaboration sometime. Yes - quite wild hoe modern technology makes collaboration across half a continent possible and getting to know someone without ever meeting in person.
      It was great to see some of your real examples and observations - plain theory is nothing without real things to back it up. People so often forget the skill need to make or repair things - I was looking at some of your surface mount soldering with envy - I struggle to do decent surface mount work!

  • @gregreynolds5686
    @gregreynolds5686 4 месяца назад +5

    Large value ceramic capacitors are not necessarily a good substitution for aluminium electrolytics - they can be mechanically fragile, noisy when handling audio frequency ripple, etc. Tantalum capacitors might be a better substitution for your example.
    But I don't disagree with your fundamental point 😊

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +2

      Good points for sure! And to add to that, the biggest issue I find is it is impractical to use them for anything other than quite small power supplies due to the relatively small capacitance values. If you need 1000uf, its hard to beat electrolytics.

  • @d46512
    @d46512 4 месяца назад +2

    Dr Jones, you explained this complex topic well without pinning the blame on “greed” or “capitalism”, but on the collective decision making that comprises the free market. Thanks. -Kevin from Ottawa

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +1

      Thanks so much Kevin! Thats what I was trying to do - so glad it came across that way! Really applicable to this area with all the hi-tech companies and startups around here!

  • @Sparky-ww5re
    @Sparky-ww5re 4 месяца назад +4

    Simple. Money. Back in the day, like in the early 1990s and before, it was normal for major appliances like ranges, refrigerators, washer/dryer to last for 30 years or more and you'd typically replace the appliance only because it looked very outdated, such as the pastel colors or earth colors popular from the 1950s - 1970s (avocado green and harvest gold come to mind). That "outdated " refrigerator was often placed in the garage to keep the beers or what have you, cold.
    Manufacturers know that if most of their products are trouble free for 25 years or longer, sales will eventually slump. Nowadays if your fancy stainless steel refrigerator lasts 10 years you feel like you hit the jackpot 🙂
    My grandparents had GE turquoise blue appliances with chrome handles and knobs, a 40 inch double oven electric range and refrigerator, purchased in 1967 when they brought the house, washing machine and gas dryer from 1968 when natural gas became available, and they were all still working as of August 2022 when we sold the house after grandma passed 4 months earlier. They really built stuff to last, and pastels were about as popular as disco was in the 70s.

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +4

      If I had a choice, I would buy only appliances with simple mechanical controls - fridges, washer, dryer, stove all worked just as well as they do now, but didnt seem to fail. Sadly you cant get appliances like that any more, at least= in the developed world. Like your experience, we bought a used 1950s fridge around 1970 when I was kid. It lasted for years and was working when it was replaced only because it didn't have automatic defrost. I do have on remnant of the non-digital days - a mechanical timer controlled microwave. Still works perfectly after about 30 years, and has the added advantage of not wasting power when it is not running.
      Funny - I do remember the avocado coloured appliances! In many ways way better than modern stainless steel that shows every fingerprint!

    • @TheOtherBill
      @TheOtherBill 4 месяца назад

      @@ElectromagneticVideos *cough*SpeedQueen*cough* 😉

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      @@TheOtherBill Long lasting? or not? As I recall Maytag was supposed to be well built back then.

  • @rorypenstock1763
    @rorypenstock1763 4 месяца назад +1

    At 2:17 I paused to see if I could figure out the formula myself.
    let annual survival probability of item 1 = P_1
    let annual survival probability of item 2 = P_2
    P_1 ^ MTBF_1 = 0.5 probability of surviving for MTBF years in a row is 0.5.
    P_1 = 0.5 ^ (1/MTBF_1)
    (P_1 * P_2) ^ MTBF_combined = 0.5
    MTBF_combined = logbase(P_1 * P_2, 0.5) solve for MTBF_combined
    MTBF_combined = log(0.5) / log(P_1 * P_2) change of base formula
    MTBF_combined = log(0.5) / log(0.5 ^ (1/MTBF_1) * 0.5 ^ (1/MTBF_2)) substitute
    At this point I figured I was done and watched the rest of the video. I had missed how you can simplify it.
    MTBF_combined = log(0.5) / log(0.5 ^ (1/MTBF_1) * 0.5 ^ (1/MTBF_2))
    MTBF_combined = log(0.5) / log(0.5 ^ (1/MTBF_1)) + log(0.5 ^ (1/MTBF_2))
    MTBF_combined = log(0.5) /((1/MTBF_1)log(0.5) + (1/MTBF_2)log(0.5))
    MTBF_combined = 1 /((1/MTBF_1) + (1/MTBF_2))

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +2

      I just stated the equation - neat that you had a real go at it. This is where I wish one could post images in the comments - as good a job as you did expressing math in text only form, its always so much easier to appreciate if one has the luxury of seeing it as one might write it with pen an paper or with an equation editor. Thanks for posting!

  • @Invisus_Letum
    @Invisus_Letum 4 месяца назад +1

    I find it "interesting" how a certain tech brand will have their customers line up, even camp overnight, something like twice a year to get the latest model of a device. What I see is, companies like this have had the iterations these "advancements" "new features" planned out for years probably longer. It seems as if people believe there are teams of r&d techs crunching in a lab year-round and somehow coming up with something (samething) newer better faster stronger (enter Daft Punk). Then again, I could be wrong I mean what do I know? 🤔

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      Interesting you put you it that way. For year I have thought Apples must lucrative "innovation" was turning technology into fashion - and it has so paid off for them. I shake my head at that, but shows how successful marketing can be. There is an element of that in Tesla, but not nearly as effective.
      Regarding planned "advancements" Year ago I read an article how shaver manufacturers were doing that in some developing countries but with technology they had developed year ago in the west: essentially marketing more and more advanced shaft razers to them one after the other, followed by electric plug in shaves and then battery ones etc. Probbaly had to do that today with the internet spread of information, but sire shows how providing am upgrade path is intensely lucrative.

  • @retrozmachine1189
    @retrozmachine1189 4 месяца назад +1

    Cost/benefit is always the case. It's not unusual to find industrial electronics doing what ever it does for 50+ years.

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +1

      Apparently in many manufacturing facilities, floppy drives and 8088 PCs are not uncommon even today. I once had to interface to something to a DOS PC in an air traffic control application!

    • @retrozmachine1189
      @retrozmachine1189 4 месяца назад

      @@ElectromagneticVideos That reminded me of a telco site I had to do some work at in the very late 90s. There was an early serial number genuine IBM PC (not XT) in a rack acting as a gateway for some dial-ins. It booted off a single floppy that loaded the bridge program directly, no DOS.

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      @@retrozmachine1189 No DOS! Wow - that itself is amazing! Those were the hardcore computer days!

  • @analoghardwaretops3976
    @analoghardwaretops3976 4 месяца назад +1

    product burn-in ,thermal cycling, "Infant mortality " , "bathtub curve" routine preventive maintenance to extend "end of life.."all 3 axis vibration & shock tests, EMI/EMC compatibility test, All these come back to mind of our basic training days😅

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      vibration & shock tests - I an always amazed at how little vibration or an extended period of time will eat though wires if they aren't secured and rub against anything. The people who ruggedize things for vehicles must do close to the impossible - I did aircraft shock and vibe and that seems to be nothing compared to what a car on a bumpy road experiences - or the thermal cycles from a car left in the sun in summer and outside in wonder.
      I have some "poor man's" shock and vibe and temperature testing setups at home that I made for initial testing of product before paying for formal testing - will have to make a video about them .
      Sounds like you have done a lot of product stuff too - few people really understand what goes into taking prototype and making it into a real product.

    • @analoghardwaretops3976
      @analoghardwaretops3976 4 месяца назад +1

      @@ElectromagneticVideos yes a varied lot..in total..but spread in time over 25 years working in a company..
      I was with the R&D div. in the Power Electronics group...besides 3 years in
      another production unit of our Industrial Electronics div...
      Being in R&D was a real plus point
      we were involved in all aspects of the products..from concept ,design , mtl.proc., prototypes, batch, mods ,production , comissioning , cust. support...etc. ...
      ...the whole gamut...so there was interaction mixing with all strata vertical & horizontal..and all were treated equal & respected

    • @analoghardwaretops3976
      @analoghardwaretops3976 4 месяца назад +1

      @@ElectromagneticVideos Very true about vibration & the" G" tests...one of our products wasso large..that only one facility in the country supported that size...& it was a 3 days journey by road transport for the product U.T. to reach there....
      & after the setup in the 2nd axis "G" test one of the door hinges failed....
      Yes we were on hot bricks...during these tests... incidentally this product was an inverter for railway coaches (govt. org.)..& their specs are stringent like you mentioned..as for aircraft.

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      @@analoghardwaretops3976 How cool! You have a very similar background to mine, other than I tend to deal with signals stuff rather than power. All those things you mentioned are so critical to productization - I will have to do a video on that sometime!

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад

      @@analoghardwaretops3976 Wow - you dealt with bid stuff. I never gave a thought to railway stuff - not surprised its a lot like for planes.
      Did you ever do stuff for the navy? There was one test where you mounted the item at the end of a sea-saw type structure and an a weight was dropped from a set height on the other end of the sea-saw, all while the device was operating. As I recall the device had to survive three drops in a row. Was to simulate the shock from a torpedo. The issue we had was the (small) circuit board flexing and shorting to the chassis. The solution was supports under the PCB. Hadn't thought about it in years - your having to take the product to a distant location for the test reminded me - same thing - only facility in Canada that could do the drop test was in Halifax.

  • @gacherumburu9958
    @gacherumburu9958 4 месяца назад +1

    👍👍

  • @leetucker9938
    @leetucker9938 4 месяца назад +1

    I have never used the usb fast charger for my phone. I let it charge at 5 v and usually stop it around 80 %

    • @ElectromagneticVideos
      @ElectromagneticVideos  4 месяца назад +1

      Wise move! I cant say I have never used it - but rarely too. I actually use slow wireless charging overnight most of the time - mainly to minimize wear and tear on the connector.